2. STORAGE AND HANDLING
In order to maintain these electrodes in the required condition the following
procedure must be followed
Low hydrogen electrodes are supplied in sealed containers and must remain
sealed until required
The electrodes must be stored in a dry place
3. Most common welding defects ,causes
and remedies
Porosity occurs as a result of weld metal contamination.
Causes of porosity
Inadequate electrode DE oxidant
Using a long arc
Improper gas shield
4. Remedies
Clean the material before you begin welding
Use dry electrodes and material
Use correct arc distance
Check the gas flow meter and make sure that its optimized as required with
proper with pressure and flow settings
5. This welding imperfection is the groove formation
at the weld toe ,reducing the cross sectional
thickness of the base metal
6. Causes
Too high weld current
Too fast weld speed
Incorrect filler metal
Remedies
Use proper electrodes angle
Reduce the arc length
7. Slag inclusion is a vitreous material that
occurs as a by-product of stick welding flux
cored arc welding and submerged arc welding
8. Causes
The weld speed is too fast
The weld pool cools down too fast
Welding current is too low
Remedies
Reduce rapid cooling
Adjust the electrode angle
Remove any slag from the previous bead
9. The focus was on storage and handling of
electrodes , welding defects ,causes and
remedies
The next presentation will focus on other welding defects such as spatter
,incomplete penetration ,incomplete fusion and cracks .
